Fanning-mill.



W. MILBRATH.

TANNING MILL.

APPLICATION FILED MAR. 12, 1900.

Patented NOV. 24, 1908.

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W. MILBRATH.

PANNING MILL.

APPLICATION TILED MAR. 12, 1906.

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Patented Nov. 24,1908.

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UNITED STATES PATENT OFFICE.

WlLLIAW MJLLBRATH, OT. LAREFIELD, MINNESOTA, ASSIGNOR OF ONE-.llAlJl 'lOSAMUEL R. DUBETZ, Ol LAKEFIELD, i\'[[NNlSO'lA.

FANNING-MILL.

Specification of Letters Patent.

Patented Nov. 24:, 1908.

Application filed March 12, 1906. Serial No. 305,509.

To all w/wm it may concern:

Be it known that I, lViLLiAit Mtnnnx'rn, a citizen of the United States,residing at Lakelield, in the county of Jackson and State of Minnesota,have invented certain new and useful Inu n'ovements in Fanning- Mills;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to grain separators of the fanning mill type, andhas for its object to improve the same in the several particularshereinafter noted.

The invention consists of the novel devices and combinations of deviceshereinafter described and defined in the claim.

In the accompanying drawings which illustrate my invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure l is a plan view of the improvedfanning mill, some parts being broken away. Fig. 9 is a side elevationof the improved fanning mill. Fig. 3 is a detail in horizontal section,illustrating a device for imparting a step by step movement to anendless separating belt, Fig. t is a vertical section takenapproximately on the line .1?" c of Fig. 1, some parts being left infull, and some parts being broken away: and Fig. 5 is a detail showingin section. a portion of the endless separating belt.

The nmneral 1. indicates a grain supply hopper which is mounted on theupper portion of a skeleton framework 2 and is shown as provided with anadjustable bottom board I), by means of which a discharge opening -'t atthe bottom of the hopper may be varied at will.

The numeral indicates a fan case secured to the frame 2, and in whichworks a fan head 6. the shaft of which works at one end and is providedwith a small sprocket 7.

Above the fan case and below the hopper, is a vibratory shoe 8 which ismounted for reciprocatin movements, transversely of the frame, or in adirection parallel to the axis of the fan shaft, the same. as shown,being supported from the side boards 9 on the upper portion of the frame2, by means of links '10 that are adapted to yield or spring sidewise topermit vibratory movement of said shoe. The shoe 8 is provided with aninclined screen 11. which receives directly from the hopper 1. anddelivers at its lower end into a laterally extended discharge spout 12.Below the sieve it is an inclined imperforate deck 13 which is alsocarried by said shoe and is provided, near its lower end, with atransversely extended discharge spout H. Mounted in the sides of theshoe below the screen 11 and above the deck i3, is a pair of guiderollers 15 and 16, over which runs an endless separating belt. or apron17. The so-called separating belt 1T underlies the entire separatingsurface of the screen It, and it is quite thick, preferably aboutone-eighth of an inch in thickness. and is provided with closelypositioned cups or pockets 18 that cover its entire outer surface. Asshown, the upper portion of the belt 17 runs over an inclined supportingdeck 19, secured to the sides of the shoe 8. The belt 17 is preferablyconstructed of rubber, but it may be forn'ied of other flexiblematerials, such as leather or (.ompositionmaterials made up of rubber,canvas, etc. The shaft of the rollers 1(3 is provided at one end with aratchet wheel 20 (see particularly Fig. 3). This ratchet wheel is actedupon by one arm of a pawl acting bell crank 21 that is pivoted to abracket on one of the frame boards 9, and the other arm of which isconnected by a short link to one side of the vibratory shoe 8. As shownand preferred, the pawl and ratchet driving devices 20,-21 223, areduplicated on the other sides of the machine, so that the separatingbelt 17 will be given an advance.movcment in both directions of movementof the shoe 8.

lclow the fan case is a second vibratorv shoe 34- that is provided witha screen 2:) that inclines in a reverse direction from the screen 11.This shoe Q-l is supported from the frame 2. by yielding links 26.Vibratory motion is imparted to the shoe 2%, from the shoe 8, through along vertically disposed lever 27. intermctiliately pivoted at 28, tothe frame '3. The upper end of the lever 27 is coimccted to the bottomof the upper end of the shoe 8 by a link 29, and the lower end thereofis connected to a transverse bar 30 of the shoe 2+, by means of a. link31.

The upper end of the screen 27 stands in position to receive grain whichis discharged off from the lower end of the imperforate deck 13 of theupper shoe. The lower shoe 2a, below the screen 25 is an inclined im- 5perforate deck which is formed with an intermediate transverselyextended discharge spout 33. The extreme lower portion of the deck 32discharges into an elevator leg 31 in which works an endless conveyer ofthe usual or any suitable construction, but involves, as shown, a bladeequipped. sprocket chain 35, and sprocket equipped shafts 36 and 3?, thesprockets of which drive the said chain. The upper sprocket equippedshaft 37, at its outer end, is provided with an additional sprocket Asshown, the grain elevated within the leg 31. is dis charged into a bagfilling hopper 35).

Power for driving the machine is, as shown, applied through a largesprocket wheel 10, mounted on one of the frame boards 9, and providedwith a hand crank ll, by means of which it may be readily turned. Journaled in suitable bearings 12 on the frame 2 is a counter shaft L 5that is provided, at its outer end, with a sprocket a1, and at its innerend, with a sprocket 15. A sprocket chain at; runs over the largesprocket 10 and over the sprockets T and 1-1. Another sprocket chain 17runs over sprocket wheels and 38. These connections impart the requiredmotion to the fan and to the elevating conveyer within the leg Mountedon bearing brackets 18 on one of the frame boards 9 is a pair ofhorizontally disposed bell cranks &9, the outwardly projecting arms ofwhich are connected by a long rod 50, and the other arms of which areconnected to the bottom of the vibratory shoe 8 by connecting rods 51.On the long connecting rod a rigidly secured arm 52. A pitman 53 ispivotally connected at one end to th arm 52, and at its other end isconnected to a crank pin 5a which, as shown, is carried by the sprocket11.

Through the connections just described, the rotary motion of the crankconnecting sprocket it will impart vibratory movements to the uppershoeS transversely of the machine; and through the connectionspreviously described, such vibratory movements will be transmitted tothe lower shoe 2st.

A machine of the character described is particularly adapted forseparating wild oats, cockle and various other materials, from wheat.The mixed material being delivered from the hopper 3 onto the screen 11,the chaff and coarse materials will be carried off over the said screen,and delivered into the discharge spout 12, while the wheat, wild oatsand other materials will pass through the perforations or meshes of thesaid sieve and will fall upon the inclined upwardly traveling endlessseparating belt 17. The small materials, such as cockle, broken wheatand small oats, will fall into the pockets 18 of the separating belt 17,and will be carried upward thereby and discharged onto the upper portionof the imperforate feed deck 13. As the belt 17 passes over the roller16, the upper portion of the pockets 18 will be expanded, therebyreleasing any of the material that otherwise would not drop out. Thewild oats which has a beard or fuzz, will also adhere to the belt 17 andwill be carried upward and delivered onto the deck 13. All materialdelivered onto the upper portion of the deck 13 will run down into thelaterally extended discharge spout 14, and will be discharged therebyfrom the machine. The wheat will run down the inclined upper surfaces ofthe belt 17, will fall therefrom onto the extreme lower end of the deck13 and from thence will be precipitated onto the upper end of the screen25, but while making this descent, it will be subjected to a blastfromthe fan and all light materials will be blown therefrom. The mesh of thesieve is such that it will not pass therethrough good wheat, but willpermit small seeds to pass therethrough, the latter being finally caughtby the spout 33, while the wheat delivered into the elevator leg 3a, andby the elevatorconveyer will be delivered into the bag filling hopperS9. The machine described, while of comparatix ely small cost, has inpractice been found efficient for the purposes had in View.

hat I claim is:

In a machine of the character described, the combination with a hopper,of a vibratory shoe mounted below said hopper, a screen on said shoe, aninclined imperforate deck on said shoe below said screen, an end lessseparating belt made of flexible material mounted to run between saidscreen and said deck, and provided with pockets on its outer face, saiddeck having a transverse discharge spout located under said endlessseparating belt, guide rollers and cooperating devices for impartingmotion to said endless belt, a second screen arranged to receive graindischarged from said endless separating belt, and an intermediatelypivoted lever for transmitting vibratory movement from the upper shoe tothe lower screen, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

VILLIAM MTLBR ATH.

Vitnesses Tnos. Gmsxn'm, O. THoREsM. V

